Please describe how you connect to the printer (WiFi or USB) and exactly what problems you are having.
In general, to set up a USB printer on a Mac, you would do the following:
1) Trash the DVD that comes in the box with the printer (the software is generally old, unnecessary, and undesirable)
2) Plug it in.
3) Mac OS may prompt and ask if it's okay to download the required printer drivers.
4) That's it, you are done and can now print
In general, to set up a WiFi printer on a Mac, your would do the following:
1) Trash the DVD that comes in the box with the printer (the software is generally old, unnecessary, and undesirable)
2) Use the control panel on your printer to join it to your WiFi network (the same network that your Mac is using)
3) Open "System Preferences" > "Printers and Scanners" and check that your printer is now listed
4) That's it, you are done and can now print